Improvement in try-squares



J. A. TRAUT Q Improvement in Try vSquares.

FIG,

JUSTUS A. TRAUT, OF NEl/V BRITAIN, CONNECTICUT, ASSIGNOR TO THE STANLEYRULE AND LEVEL COMPANY, OF SAME PLACE.

IMPROVEMENT IN TRY-SQUARES.

Specification forming part of Letters Patent No. 125,858, dated April16, 1872.

To all whom it may concern:

Be it known that I, J UsrUs A. TRAUT, of New Britain, county of Hartfordand State of Connecticut, have invented certain new and usefulimprovements in the construction or man ufacture, and the process ofthat construction or manufacture, of Try-Squares and to enable othersskilled in the art to make the same I will proceed to describe,referring to the drawing, in which the same letters indicate like partsin each of the figures.

The nature of my invention consists in an improvement in theconstruction of the metal stock of the handle of a try-square, and in'its combination with the blade, and also with a single wooden block,which forms the principal part of the outer surface of the handle.

In the accompanying drawing, a is a metaledge face-plate, (whichheretofore, for the most part, has been made or secured to the edge ofthe wood portion or handle of a try-square.) b is an end face-plate,which covers, protects, and supports one end of the wood which forms thehandle proper. c is a metal hub formed in the angle of the two plates a1). dis a metal rib of thinner stock than that required for the hub c.This hub c and rib d are arranged in the center of the plates a I).These side and end plates at b, hub c, and rib d constitute what I calla stock, cast in one piece, of metal. The faces of these plates arefirst trued or planed; then the face-plate a is firmly secured orcompressed in a milling-machine, and a slit is cut in and nearly throughthe whole depth of the hub for the reception of the blade 6, and so thatwhen the blade is firmly compressed upon the bottom of the slit it will(at its lower edge) form a true right angle with the face of the platea; and while it is still compressed in said position holes are punchedor drilled through the hub and blade for the reception of pins or rivetsff, which, when they are headed down, will firmly secure the blade ofthe square in a right-angled position with the face-plate of the stock.h is a wood stock, formed in one piece, which is clamped in a machineand subjected to the action of properly-formed cutters to producegrooves or openings to receive the hub c and rib d and produce theproper shape of its sides and ends, so as to closely fit up to theplates to b; then a pin or screw, i, is inserted into the wood throughthe orifice i, which secures and compresses the wood h in its relativeposition on or to the stock.

To recapitulate, the metal stock consists of a face-plate, a, end plateb, hub c, and rib d, in the upper or hub portion 0 of which is cut orformed ,a slot, in which the end of the blade 6 is firmly secured byscrews or rivets f f, so as to secure permanent accuracy or right angleof the blade 6 with the face-plate a of the stock, and in order torender it complete and merchantable in finish I have fitted a piece ofwood or other suitable material over the rib d and hub c, and closely tothe plates a b, and secured it firmly thereto by means of rivets orscrews 2', thus distinguishing it in its simplicity and facility ofconstruction, its adaptedness for the trade, and its desirableness foruse.

I believe I have thus shown the nature, construction, and advantage ofthis invention so as to enable others skilled in the art to make thesame therefrom.

I do not claim any improvement in a handsaw or in devices for markingcombined with a saw, as shown in H. Smiths patent of May 18, 1858; but

I claim 1. A try-square, in which are combined with the blade a metalstock slitted and secured to the blade, as shown, and provided withaflange or rib, a, and a single wooden block, h,s1itted and adapted toboth sides of said stock, and applied thereto, all substantially as setforth.

2. Ialso claim, in combination with the blade, the slitted metal stock,provided with flanges a and b, and with a strengthening-rib, d, and thewooden block h, screwed or riveted to such stock, all as shown anddescribed.

J USTUS A. TRAUT. [L. s.]

Witnesses:

E. W. BLIss, JEREMY W. BLIss.

